// .mdatr —— Metin2 AttributeData 静态碰撞 / 高度网格资源。
//
// The legacy client reads this file as a packed little-endian stream.  Keep the
// format layer independent from Godot so it can be used by the world loader and
// by host-side validation tests alike.
#pragma once

#include <array>
#include <cstdint>
#include <string>
#include <vector>

namespace fmt {

enum class AttributeCollisionType : std::uint32_t {
    Plane = 0,
    Box = 1,
    Sphere = 2,
    Cylinder = 3,
    Aabb = 4,
    Obb = 5,
};

struct AttributeCollision {
    std::uint32_t type = 0;
    std::string name;
    std::array<float, 3> position = {0.0f, 0.0f, 0.0f};
    // Plane/Cylinder use dimensions[0..1], the other supported primitives use
    // dimensions[0..2].  Values retain the source units (centimetres).
    std::array<float, 3> dimensions = {0.0f, 0.0f, 0.0f};
    // x, y, z, w in the same order as the D3DXQUATERNION on disk.
    std::array<float, 4> quaternion = {0.0f, 0.0f, 0.0f, 1.0f};
};

struct AttributeHeight {
    std::string name;
    // The legacy file calls these vertices "primitives".  They are a flat
    // triangle list: every consecutive three vertices form one triangle.
    std::vector<std::array<float, 3>> vertices;
};

struct AttributeData {
    std::vector<AttributeCollision> collisions;
    std::vector<AttributeHeight> heights;
};

// Parse the complete byte buffer.  The parser rejects truncated data, unknown
// primitive types and unreasonable counts rather than accepting a partial
// collision resource.
bool parse_attribute_data(const std::uint8_t *data, std::size_t size,
                          AttributeData &out, std::string *err = nullptr);

bool parse_attribute_data_file(const std::string &path, AttributeData &out,
                               std::string *err = nullptr);

} // namespace fmt